干旱区生态环境知识资源中心(Arid): Computing of Permeability Tensor and Seepage Flow Model of Intact Malan Loess by X-ray Computed Tomography

Arid

DOI	10.3390/w15152851
	Computing of Permeability Tensor and Seepage Flow Model of Intact Malan Loess by X-ray Computed Tomography
	Lu, Yangchun; Lu, Yudong; Lu, Ting; Wang, Bo; Zeng, Guanghao; Zhang, Xu
通讯作者	Lu, YD
来源期刊	WATER
EISSN	2073-4441
出版年	2023
卷号	15 期号:15
英文摘要	Malan loess is an eolian sediment in arid and semi-arid areas. It is of great significance to study the pore structure of Malan loess for its evolution, strength, and mechanical properties. In order to quantitatively characterize the absolute permeability tensor of Malan loess and to simulate the seepage process of Malan loess, this study calculated the specific yield of intact Malan loess with a homemade seepage experimental device and recorded the water flow process on the surface of Malan loess during the seepage process. Modern computed tomography was used to scan the intact Malan loess samples from Jiuzhoutai, Lanzhou (western part of the Loess Plateau, China); the specific yield of the intact loess was used as the parameter value for the threshold segmentation of the scanned image for the 3D reconstruction of the connected pore space, the solver program in AVIZO software was used to solve the absolute permeability tensor of Malan loess using the volume averaging method combined with the CT scan to reconstruct the 3D pore space, and the simulation of the seepage process was carried out. The simulation results showed that Malan loess is a highly anisotropic loess; the absolute permeability in the vertical direction is 9.02 times and 3.86 times higher than the permeability in the horizontal direction. The pore spaces are well connected in the vertical direction (forming a near-vertical arrangement of pipes) and weakly connected in the horizontal direction. In the seepage simulation, it was found that the water flows first along the vertically oriented channels and then fills the horizontally oriented pores; the absolute permeability coefficient was calculated to be 0.3482 & mu;m(2). The indoor seepage experiment was consistent with the simulation experiment, which verifies the reliability of the calculated model.
英文关键词	volumetric averaging CT scan specific yield absolute permeability seepage simulation
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001045733800001
WOS关键词	POROUS-MEDIUM ; EVOLUTION ; PLATEAU ; FLUID
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/399055
推荐引用方式 GB/T 7714	Lu, Yangchun,Lu, Yudong,Lu, Ting,et al. Computing of Permeability Tensor and Seepage Flow Model of Intact Malan Loess by X-ray Computed Tomography[J],2023,15(15).
APA	Lu, Yangchun,Lu, Yudong,Lu, Ting,Wang, Bo,Zeng, Guanghao,&Zhang, Xu.(2023).Computing of Permeability Tensor and Seepage Flow Model of Intact Malan Loess by X-ray Computed Tomography.WATER,15(15).
MLA	Lu, Yangchun,et al."Computing of Permeability Tensor and Seepage Flow Model of Intact Malan Loess by X-ray Computed Tomography".WATER 15.15(2023).